
https://wiiw.ac.at/the-granular-trade-and-production-activities-grantpa-database-dlp-6911.pdf

http://reutersinstitute.politics.ox.ac.uk/risj-review/sympathetic-unconcerned-how-europes-media-cover-brexit

https://www.lobbycontrol.de/wp-content/uploads/gaslobby-studie-lobbycontrol.pdf